Improved kiln for bone-black



dimmi A EDWARD P. EASTVVICK, 0F BALTIMORE, MARYLAND. Letters Patent No. 88,7 02, dated A11/ril 6, 1869. g

IMPROVED KILN FOR' BONE-BLACK.

The Schedule referred to inthese Letters Patent and making part of the sama.

To all 'whom 'it mag/:concern:

Be it known'that I, EDwARnP. EASTWIGK, of the city of Baltimore, in the State of Maryland, have invented a new and useful Improvement in Bone-Black Kilns, or kilns for similar purposes.

My invention consists in the mode of supporting two or more vertical retorts, which, with the cooler below, form, on the inside, a continuous chamber in the boneblack kiln, or kiln for similar purposes, in such manner that each retort in the continuous chamber is indepen dently supported from below, and is allowed a separate and independent expansion, as is herein substantially described and setl forth.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same.

In the accompanying drawing- Figure l represents a vertical section of one-half of a bone-black kiln, with au upper chamber, A, and lower chamber B, the former containing a series of upper retorts, one of which is represented by R, and the latter, a corresponding series `of' lower ret-Orts, one of which is represented by R', with a corresponding series of coolers below, one of which is represented by K.

Figure 2 represents the lower retort, independently supported, and overlapping the lower end of the retort above it.

The lower retort R' rests vertically 'on the lower floor f of the kiln, as seen in fig. 1, o1"l other lower support, in such manner that its upper end extends up into and enters the mouth of the retort R, immediately above it, where it is allowed free expansion room, for which purpose, the retort above may be slightly bell-shaped at the bottom, or otherwise.

The upper retort- R is sustained on the central sup port, which, in fig. l, is represented by H', the floor of the upper chamber, so that its upper end extends up into and enters, as in the drawing, the mouth of the retort, immediately above it, or, when it is the top retort, it may enter vthe'space S, left at the topoi lthe kiln for its expansion. The upper retort, at the top oi' the kiln, may be bell-shaped, as seen in iig; 1. Thus,

any number of vertical retorts may be used, one above the other.

Over this space S at the top ofthe kiln, the top plate, Vwith neck O, should be inserted as a guard.

The cooler K, below, is independently supported, and maybe attached in any of the well-known methods which may be preferred. One mode is indicated in liv. l.

oThe lower retortl may extend around instead of into the mouth of the retort above it, as seen in iig. 2, where it expands into the space S', left for the purpose, in which case the upper retort is supported bya lange, It, or similar device. I do not prefer this method, however.

The spaces S and S', and around where the upper and lower retorts and coolers are conuected,`should be care fully lated and bricked around on the outside, and care should be taken throughout, to form as continuous a chamber as practicable, from the top of the upper retort, to thc bottom ot' the cooler.

By the above-described arrangement, double-chamhered kilns, with their vast saving of fuel, are rendered more practicable, as an independent expansion for each retort upward int-o the mouth of the retort above it, or into the space S or S', is provided for, which is not the case' with double-chambered kilns as commonly used, and the disadvantages of one long retort, or, whatis practically the same, two or three retorts fastened firmly and rigidly together, with the attendant communicated expansion and contortion i'om below, where the greater heat is Sustained, and to which the length but adds a leverage, and no provision is made for the independent expansion of the retorts, avoided, thus obviating'theA wear and tear incident to other doublechambered kilns, admitting of a cheaper construction, and rendering the kiln more durable and economical.

I do not claim the. well-known method of inserting one pipe within another; but,

' What I claim' as my invention, and desire to se- Vcontinuous chamber is independently supported from below and is allowed a se )arate and inde eudent exl 7 V u u panslon, as 1s herein substant1ally described and set forth.

EDW. P. EASTWIOK. Witnesses ANDREW LoNGAcRE, Gno. S. WEST. 

